From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qt0-f198.google.com (mail-qt0-f198.google.com [209.85.216.198]) by kanga.kvack.org (Postfix) with ESMTP id A92C56B0006 for ; Wed, 11 Jul 2018 08:19:55 -0400 (EDT) Received: by mail-qt0-f198.google.com with SMTP id j11-v6so16452797qtp.0 for ; Wed, 11 Jul 2018 05:19:55 -0700 (PDT) Received: from mx1.redhat.com (mx3-rdu2.redhat.com. [66.187.233.73]) by mx.google.com with ESMTPS id t81-v6si2986061qka.286.2018.07.11.05.19.54 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 11 Jul 2018 05:19:54 -0700 (PDT) Subject: Re: [RFC PATCH v2 27/27] x86/cet: Add arch_prctl functions for CET References: <20180710222639.8241-1-yu-cheng.yu@intel.com> <20180710222639.8241-28-yu-cheng.yu@intel.com> From: Florian Weimer Message-ID: Date: Wed, 11 Jul 2018 14:19:43 +0200 MIME-Version: 1.0 In-Reply-To: <20180710222639.8241-28-yu-cheng.yu@intel.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: owner-linux-mm@kvack.org List-ID: To: Yu-cheng Yu , x86@kernel.org, "H. Peter Anvin" , Thomas Gleixner , Ingo Molnar , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-api@vger.kernel.org, Arnd Bergmann , Andy Lutomirski , Balbir Singh , Cyrill Gorcunov , Dave Hansen , "H.J. Lu" , Jann Horn , Jonathan Corbet , Kees Cook , Mike Kravetz , Nadav Amit , Oleg Nesterov , Pavel Machek , Peter Zijlstra , "Ravi V. Shankar" , Vedvyas Shanbhogue On 07/11/2018 12:26 AM, Yu-cheng Yu wrote: > arch_prctl(ARCH_CET_DISABLE, unsigned long features) > Disable SHSTK and/or IBT specified in 'features'. Return -EPERM > if CET is locked out. > > arch_prctl(ARCH_CET_LOCK) > Lock out CET feature. Isn't it a a??lock ina?? rather than a a??lock outa??? Thanks, Florian